In your Coinbase Commerce account, got to Settings -> Webhook subscriptions ->Add endpointURL to be called will be https://ipn.YourDomain/ipn/coinbase/
Enable all events
-> Save
REQUIRED FIELDS
Coinbase Api Key
In your account, got to Settings -> Api keys if one is not provided click on Create An Api key
Coinbase Webhook Shared Secret
In your account, got to Settings -> Webhook subscriptions -> Show shared secret